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rebuild.ts
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rebuild.ts
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import {
killAllProcesses,
waitForAnyProcessOutputToMatch,
execAndWaitForOutputToMatch,
ng,
} from '../../utils/process';
import {writeFile, writeMultipleFiles} from '../../utils/fs';
import {wait} from '../../utils/utils';
import {request} from '../../utils/http';
const validBundleRegEx = /: Compiled successfully./;
export default function() {
return execAndWaitForOutputToMatch('ng', ['serve'], validBundleRegEx)
// Add a lazy module.
.then(() => ng('generate', 'module', 'lazy', '--routing'))
// Should trigger a rebuild with a new bundle.
// We need to use Promise.all to ensure we are waiting for the rebuild just before we write
// the file, otherwise rebuilds can be too fast and fail CI.
.then(() => Promise.all([
waitForAnyProcessOutputToMatch(validBundleRegEx, 20000),
writeFile('src/app/app.module.ts', `
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';
import { AppComponent } from './app.component';
import { RouterModule } from '@angular/router';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
FormsModule,
HttpClientModule,
RouterModule.forRoot([
{ path: 'lazy', loadChildren: () => import('./lazy/lazy.module').then(m => m.LazyModule) }
])
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
`)
]))
// Count the bundles.
.then((results) => {
const stdout = results[0].stdout;
// First regexp is for Webpack 4; Second is for Webpack 5
if (!/(lazy-module|0)\.js/g.test(stdout) && !/lazy_module_ts\.js/g.test(stdout)) {
throw new Error('Expected webpack to create a new chunk, but did not.');
}
})
// Change multiple files and check that all of them are invalidated and recompiled.
.then(() => Promise.all([
waitForAnyProcessOutputToMatch(validBundleRegEx, 20000),
writeMultipleFiles({
'src/app/app.module.ts': `
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
console.log('$$_E2E_GOLDEN_VALUE_1');
export let X = '$$_E2E_GOLDEN_VALUE_2';
`,
'src/main.ts': `
import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app/app.module';
import { environment } from './environments/environment';
if (environment.production) {
enableProdMode();
}
platformBrowserDynamic().bootstrapModule(AppModule);
import * as m from './app/app.module';
console.log(m.X);
console.log('$$_E2E_GOLDEN_VALUE_3');
`
})
]))
.then(() => Promise.all([
waitForAnyProcessOutputToMatch(validBundleRegEx, 20000),
writeMultipleFiles({
'src/app/app.module.ts': `
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
console.log('$$_E2E_GOLDEN_VALUE_1');
export let X = '$$_E2E_GOLDEN_VALUE_2';
console.log('File changed with no import/export changes');
`,
}),
]))
.then(() => wait(2000))
.then(() => request('http://localhost:4200/main.js'))
.then((body) => {
if (!body.match(/\$\$_E2E_GOLDEN_VALUE_1/)) {
throw new Error('Expected golden value 1.');
}
if (!body.match(/\$\$_E2E_GOLDEN_VALUE_2/)) {
throw new Error('Expected golden value 2.');
}
if (!body.match(/\$\$_E2E_GOLDEN_VALUE_3/)) {
throw new Error('Expected golden value 3.');
}
})
.then(() => killAllProcesses(), (err: unknown) => {
killAllProcesses();
throw err;
});
}